The first menu asks what how you want the flea to behave. The flea is a single pixel moving about
randomly. It starts in the center of the screen. If the flea is caged, it cannot go beyond the scope of
the screen. If the flea is infinite, it will wrap from one side of the screen, across to another, if the flea
is escaping, when it escapes, the game ends. The Stone menu asks if you would like to have a stone dropping on
the flea. If you select crushing, the stone will try to drop and kill the flea. If they hit, the game ends.